2 This file is part of the lzop file compressor.
4 Copyright (C) 1996..2003 Markus Franz Xaver Johannes Oberhumer
7 Markus F.X.J. Oberhumer <markus@oberhumer.com>
8 http://www.oberhumer.com/opensource/lzop/
10 lzop and the LZO library are free software; you can redistribute them
11 and/or modify them under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2 of
13 the License, or (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; see the file COPYING.
22 If not, write to the Free Software Foundation, Inc.,
23 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 "Minimalized" for busybox by Alain Knaff
32 //config: Lzop compression/decompresion.
34 //config:config LZOP_COMPR_HIGH
35 //config: bool "lzop compression levels 7,8,9 (not very useful)"
37 //config: depends on LZOP
39 //config: High levels (7,8,9) of lzop compression. These levels
40 //config: are actually slower than gzip at equivalent compression ratios
41 //config: and take up 3.2K of code.
43 //applet:IF_LZOP(APPLET(lzop, BB_DIR_BIN, BB_SUID_DROP))
44 //applet:IF_LZOP(APPLET_ODDNAME(lzopcat, lzop, BB_DIR_USR_BIN, BB_SUID_DROP, lzopcat))
45 //applet:IF_LZOP(APPLET_ODDNAME(unlzop, lzop, BB_DIR_USR_BIN, BB_SUID_DROP, unlzop))
46 //kbuild:lib-$(CONFIG_LZOP) += lzop.o
48 //usage:#define lzop_trivial_usage
49 //usage: "[-cfvd123456789CF] [FILE]..."
50 //usage:#define lzop_full_usage "\n\n"
51 //usage: " -1..9 Compression level"
52 //usage: "\n -d Decompress"
53 //usage: "\n -c Write to stdout"
54 //usage: "\n -f Force"
55 //usage: "\n -v Verbose"
56 //usage: "\n -F Don't store or verify checksum"
57 //usage: "\n -C Also write checksum of compressed block"
59 //usage:#define lzopcat_trivial_usage
60 //usage: "[-vCF] [FILE]..."
61 //usage:#define lzopcat_full_usage "\n\n"
62 //usage: " -v Verbose"
63 //usage: "\n -F Don't store or verify checksum"
65 //usage:#define unlzop_trivial_usage
66 //usage: "[-cfvCF] [FILE]..."
67 //usage:#define unlzop_full_usage "\n\n"
68 //usage: " -c Write to stdout"
69 //usage: "\n -f Force"
70 //usage: "\n -v Verbose"
71 //usage: "\n -F Don't store or verify checksum"
74 #include "common_bufsiz.h"
75 #include "bb_archive.h"
76 #include "liblzo_interface.h"
78 /* lzo-2.03/src/lzo_ptr.h */
79 #define pd(a,b) ((unsigned)((a)-(b)))
81 #define lzo_version() LZO_VERSION
82 #define lzo_sizeof_dict_t (sizeof(uint8_t*))
84 /* lzo-2.03/include/lzo/lzo1x.h */
85 #define LZO1X_1_MEM_COMPRESS (16384 * lzo_sizeof_dict_t)
86 #define LZO1X_1_15_MEM_COMPRESS (32768 * lzo_sizeof_dict_t)
87 #define LZO1X_999_MEM_COMPRESS (14 * 16384 * sizeof(short))
89 /* lzo-2.03/src/lzo1x_oo.c */
90 #define NO_LIT UINT_MAX
92 /**********************************************************************/
93 static void copy2(uint8_t* ip, const uint8_t* m_pos, unsigned off)
102 static void copy3(uint8_t* ip, const uint8_t* m_pos, unsigned off)
106 ip[2] = ip[1] = m_pos[0];
118 /**********************************************************************/
119 // optimize a block of data.
120 /**********************************************************************/
121 #define TEST_IP (ip < ip_end)
122 #define TEST_OP (op <= op_end)
124 static NOINLINE int lzo1x_optimize(uint8_t *in, unsigned in_len,
125 uint8_t *out, unsigned *out_len,
126 void* wrkmem UNUSED_PARAM)
132 uint8_t* const ip_end = in + in_len;
133 uint8_t* const op_end = out + *out_len;
134 uint8_t* litp = NULL;
136 unsigned next_lit = NO_LIT;
138 unsigned long o_m1_a = 0, o_m1_b = 0, o_m2 = 0, o_m3_a = 0, o_m3_b = 0;
140 // LZO_UNUSED(wrkmem);
151 goto first_literal_run;
154 while (TEST_IP && TEST_OP) {
173 do *op++ = *ip++; while (--t > 0);
180 m_pos = op - 1 - 0x800;
182 m_pos = op - 1 - 0x400;
195 if (t < 16) { /* a M1 match */
204 /* test if a match follows */
205 if (nl == 0 && lit == 1 && ip[0] >= 16) {
207 /* adjust length of previous short run */
209 *litp = (unsigned char)((*litp & ~3) | lit);
210 /* copy over the 2 literals that replace the match */
211 copy2(ip-2, m_pos, pd(op, m_pos));
214 /* test if a literal run follows */
219 && (lit + 2 + ip[0] < 16)
222 /* remove short run */
224 /* copy over the 2 literals that replace the match */
225 copy2(ip-3+1, m_pos, pd(op, m_pos));
226 /* move literals 1 byte ahead */
229 memmove(litp+1, litp, lit);
230 /* insert new length of long literal run */
232 *litp = (unsigned char)(lit - 3);
237 goto copy_literal_run;
244 if (t >= 64) { /* a M2 match */
247 m_pos -= (t >> 2) & 7;
251 m_pos -= (t >> 2) & 3;
259 /* test if in beetween two long literal runs */
260 if (t == 1 && lit > 3 && nl == 0
261 && ip[0] < 16 && ip[0] != 0 && (lit + 3 + ip[0] < 16)
264 /* copy over the 3 literals that replace the match */
265 copy3(ip-1-2, m_pos, pd(op, m_pos));
266 /* set new length of previous literal run */
268 *litp = (unsigned char)(lit - 3);
273 goto copy_literal_run;
276 if (t >= 32) { /* a M3 match */
287 } else { /* a M4 match */
289 m_pos -= (t & 8) << 11;
307 /* test if in beetween two matches */
308 if (t == 1 && lit == 0 && nl == 0 && ip[0] >= 16) {
310 /* make a previous short run */
312 *litp = (unsigned char)((*litp & ~3) | lit);
313 /* copy over the 3 literals that replace the match */
314 copy3(ip-3, m_pos, pd(op, m_pos));
317 /* test if a literal run follows */
318 else if (t == 1 && lit <= 3 && nl == 0
319 && ip[0] < 16 && ip[0] != 0 && (lit + 3 + ip[0] < 16)
322 /* remove short run */
324 /* copy over the 3 literals that replace the match */
325 copy3(ip-4+1, m_pos, pd(op, m_pos));
326 /* move literals 1 byte ahead */
329 memmove(litp+1,litp,lit);
330 /* insert new length of long literal run */
332 *litp = (unsigned char)(lit - 3);
338 goto copy_literal_run;
344 do *op++ = *m_pos++; while (--t > 0);
348 if (next_lit == NO_LIT) {
360 do *op++ = *ip++; while (--t > 0);
362 } while (TEST_IP && TEST_OP);
365 /* no EOF code was found */
366 *out_len = pd(op, out);
367 return LZO_E_EOF_NOT_FOUND;
370 // LZO_UNUSED(o_m1_a); LZO_UNUSED(o_m1_b); LZO_UNUSED(o_m2);
371 // LZO_UNUSED(o_m3_a); LZO_UNUSED(o_m3_b);
372 *out_len = pd(op, out);
373 return (ip == ip_end ? LZO_E_OK :
374 (ip < ip_end ? LZO_E_INPUT_NOT_CONSUMED : LZO_E_INPUT_OVERRUN));
377 /**********************************************************************/
378 #define F_OS F_OS_UNIX
379 #define F_CS F_CS_NATIVE
381 /**********************************************************************/
382 #define ADLER32_INIT_VALUE 1
383 #define CRC32_INIT_VALUE 0
385 /**********************************************************************/
392 /**********************************************************************/
394 #define F_ADLER32_D 0x00000001L
395 #define F_ADLER32_C 0x00000002L
396 #define F_H_EXTRA_FIELD 0x00000040L
397 #define F_H_GMTDIFF 0x00000080L
398 #define F_CRC32_D 0x00000100L
399 #define F_CRC32_C 0x00000200L
400 #define F_H_FILTER 0x00000800L
401 #define F_H_CRC32 0x00001000L
402 #define F_MASK 0x00003FFFL
404 /* operating system & file system that created the file [mostly unused] */
405 #define F_OS_UNIX 0x03000000L
406 #define F_OS_SHIFT 24
407 #define F_OS_MASK 0xff000000L
409 /* character set for file name encoding [mostly unused] */
410 #define F_CS_NATIVE 0x00000000L
411 #define F_CS_SHIFT 20
412 #define F_CS_MASK 0x00f00000L
414 /* these bits must be zero */
415 #define F_RESERVED ((F_MASK | F_OS_MASK | F_CS_MASK) ^ 0xffffffffL)
417 typedef struct chksum_t {
422 typedef struct header_t {
424 unsigned lib_version;
425 unsigned version_needed_to_extract;
430 uint32_t header_checksum;
432 uint32_t extra_field_len;
433 uint32_t extra_field_checksum;
435 unsigned char method;
443 /*const uint32_t *lzo_crc32_table;*/
447 #define G (*(struct globals*)bb_common_bufsiz1)
448 #define INIT_G() do { setup_common_bufsiz(); } while (0)
449 //#define G (*ptr_to_globals)
450 //#define INIT_G() do {
451 // SET_PTR_TO_GLOBALS(xzalloc(sizeof(G)));
455 /**********************************************************************/
456 #define LZOP_VERSION 0x1010
457 //#define LZOP_VERSION_STRING "1.01"
458 //#define LZOP_VERSION_DATE "Apr 27th 2003"
460 #define OPTION_STRING "cfvqdt123456789CF"
462 /* Note: must be kept in sync with archival/bbunzip.c */
464 OPT_STDOUT = (1 << 0),
465 OPT_FORCE = (1 << 1),
466 OPT_VERBOSE = (1 << 2),
467 OPT_QUIET = (1 << 3),
468 OPT_DECOMPRESS = (1 << 4),
483 /**********************************************************************/
485 // adapted from free code by Mark Adler <madler@alumni.caltech.edu>
486 // see http://www.zlib.org/
487 /**********************************************************************/
488 static FAST_FUNC uint32_t
489 lzo_adler32(uint32_t adler, const uint8_t* buf, unsigned len)
492 LZO_BASE = 65521, /* largest prime smaller than 65536 */
493 /* NMAX is the largest n such that
494 * 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
497 uint32_t s1 = adler & 0xffff;
498 uint32_t s2 = (adler >> 16) & 0xffff;
505 k = len < LZO_NMAX ? (unsigned) len : LZO_NMAX;
514 return (s2 << 16) | s1;
517 static FAST_FUNC uint32_t
518 lzo_crc32(uint32_t c, const uint8_t* buf, unsigned len)
520 //if (buf == NULL) - impossible
523 return ~crc32_block_endian0(~c, buf, len, global_crc32_table);
526 /**********************************************************************/
527 static void init_chksum(chksum_t *ct)
529 ct->f_adler32 = ADLER32_INIT_VALUE;
530 ct->f_crc32 = CRC32_INIT_VALUE;
533 static void add_bytes_to_chksum(chksum_t *ct, const void* buf, int cnt)
535 /* We need to handle the two checksums at once, because at the
536 * beginning of the header, we don't know yet which one we'll
538 ct->f_adler32 = lzo_adler32(ct->f_adler32, (const uint8_t*)buf, cnt);
539 ct->f_crc32 = lzo_crc32(ct->f_crc32, (const uint8_t*)buf, cnt);
542 static uint32_t chksum_getresult(chksum_t *ct, const header_t *h)
544 return (h->flags & F_H_CRC32) ? ct->f_crc32 : ct->f_adler32;
547 /**********************************************************************/
548 static uint32_t read32(void)
555 static void write32(uint32_t v)
561 static void f_write(const void* buf, int cnt)
564 add_bytes_to_chksum(&G.chksum_out, buf, cnt);
567 static void f_read(void* buf, int cnt)
570 add_bytes_to_chksum(&G.chksum_in, buf, cnt);
573 static int f_read8(void)
580 static void f_write8(uint8_t v)
585 static unsigned f_read16(void)
592 static void f_write16(uint16_t v)
598 static uint32_t f_read32(void)
605 static void f_write32(uint32_t v)
611 /**********************************************************************/
612 static int lzo_get_method(header_t *h)
615 if (h->method == M_LZO1X_1) {
618 } else if (h->method == M_LZO1X_1_15) {
621 } else if (h->method == M_LZO1X_999) {
625 return -1; /* not a LZO method */
627 /* check compression level */
628 if (h->level < 1 || h->level > 9)
634 /**********************************************************************/
635 #define LZO_BLOCK_SIZE (256 * 1024l)
636 #define MAX_BLOCK_SIZE (64 * 1024l * 1024l) /* DO NOT CHANGE */
638 /* LZO may expand uncompressible data by a small amount */
639 #define MAX_COMPRESSED_SIZE(x) ((x) + (x) / 16 + 64 + 3)
641 /**********************************************************************/
643 /**********************************************************************/
644 static NOINLINE int lzo_compress(const header_t *h)
646 unsigned block_size = LZO_BLOCK_SIZE;
647 int r = 0; /* LZO_E_OK */
648 uint8_t *const b1 = xzalloc(block_size);
649 uint8_t *const b2 = xzalloc(MAX_COMPRESSED_SIZE(block_size));
650 unsigned src_len = 0, dst_len = 0;
651 uint32_t d_adler32 = ADLER32_INIT_VALUE;
652 uint32_t d_crc32 = CRC32_INIT_VALUE;
654 uint8_t *wrk_mem = NULL;
656 if (h->method == M_LZO1X_1)
657 wrk_mem = xzalloc(LZO1X_1_MEM_COMPRESS);
658 else if (h->method == M_LZO1X_1_15)
659 wrk_mem = xzalloc(LZO1X_1_15_MEM_COMPRESS);
660 else if (h->method == M_LZO1X_999)
661 wrk_mem = xzalloc(LZO1X_999_MEM_COMPRESS);
665 l = full_read(0, b1, block_size);
666 src_len = (l > 0 ? l : 0);
668 /* write uncompressed block size */
671 /* exit if last block */
675 /* compute checksum of uncompressed block */
676 if (h->flags & F_ADLER32_D)
677 d_adler32 = lzo_adler32(ADLER32_INIT_VALUE, b1, src_len);
678 if (h->flags & F_CRC32_D)
679 d_crc32 = lzo_crc32(CRC32_INIT_VALUE, b1, src_len);
682 if (h->method == M_LZO1X_1)
683 r = lzo1x_1_compress(b1, src_len, b2, &dst_len, wrk_mem);
684 else if (h->method == M_LZO1X_1_15)
685 r = lzo1x_1_15_compress(b1, src_len, b2, &dst_len, wrk_mem);
686 #if ENABLE_LZOP_COMPR_HIGH
687 else if (h->method == M_LZO1X_999)
688 r = lzo1x_999_compress_level(b1, src_len, b2, &dst_len,
692 bb_error_msg_and_die("internal error");
694 if (r != 0) /* not LZO_E_OK */
695 bb_error_msg_and_die("internal error - compression failed");
697 /* write compressed block size */
698 if (dst_len < src_len) {
700 if (h->method == M_LZO1X_999) {
701 unsigned new_len = src_len;
702 r = lzo1x_optimize(b2, dst_len, b1, &new_len, NULL);
703 if (r != 0 /*LZO_E_OK*/ || new_len != src_len)
704 bb_error_msg_and_die("internal error - optimization failed");
708 /* data actually expanded => store data uncompressed */
712 /* write checksum of uncompressed block */
713 if (h->flags & F_ADLER32_D)
715 if (h->flags & F_CRC32_D)
718 if (dst_len < src_len) {
719 /* write checksum of compressed block */
720 if (h->flags & F_ADLER32_C)
721 write32(lzo_adler32(ADLER32_INIT_VALUE, b2, dst_len));
722 if (h->flags & F_CRC32_C)
723 write32(lzo_crc32(CRC32_INIT_VALUE, b2, dst_len));
724 /* write compressed block data */
725 xwrite(1, b2, dst_len);
727 /* write uncompressed block data */
728 xwrite(1, b1, src_len);
738 static FAST_FUNC void lzo_check(
740 uint8_t* buf, unsigned len,
741 uint32_t FAST_FUNC (*fn)(uint32_t, const uint8_t*, unsigned),
744 /* This function, by having the same order of parameters
745 * as fn, and by being marked FAST_FUNC (same as fn),
746 * saves a dozen bytes of code.
748 uint32_t c = fn(init, buf, len);
750 bb_error_msg_and_die("checksum error");
753 /**********************************************************************/
755 /**********************************************************************/
756 static NOINLINE int lzo_decompress(const header_t *h)
758 unsigned block_size = LZO_BLOCK_SIZE;
760 uint32_t src_len, dst_len;
761 uint32_t c_adler32 = ADLER32_INIT_VALUE;
762 uint32_t d_adler32 = ADLER32_INIT_VALUE;
763 uint32_t c_crc32 = CRC32_INIT_VALUE, d_crc32 = CRC32_INIT_VALUE;
765 uint32_t mcs_block_size = MAX_COMPRESSED_SIZE(block_size);
771 /* read uncompressed block size */
774 /* exit if last block */
778 /* error if split file */
779 if (dst_len == 0xffffffffL)
780 /* should not happen - not yet implemented */
781 bb_error_msg_and_die("this file is a split lzop file");
783 if (dst_len > MAX_BLOCK_SIZE)
784 bb_error_msg_and_die("corrupted data");
786 /* read compressed block size */
788 if (src_len <= 0 || src_len > dst_len)
789 bb_error_msg_and_die("corrupted data");
791 if (dst_len > block_size) {
796 block_size = dst_len;
797 mcs_block_size = MAX_COMPRESSED_SIZE(block_size);
800 /* read checksum of uncompressed block */
801 if (h->flags & F_ADLER32_D)
802 d_adler32 = read32();
803 if (h->flags & F_CRC32_D)
806 /* read checksum of compressed block */
807 if (src_len < dst_len) {
808 if (h->flags & F_ADLER32_C)
809 c_adler32 = read32();
810 if (h->flags & F_CRC32_C)
815 b2 = xzalloc(mcs_block_size);
816 /* read the block into the end of our buffer */
817 b1 = b2 + mcs_block_size - src_len;
818 xread(0, b1, src_len);
820 if (src_len < dst_len) {
821 unsigned d = dst_len;
823 if (!(option_mask32 & OPT_F)) {
824 /* verify checksum of compressed block */
825 if (h->flags & F_ADLER32_C)
826 lzo_check(ADLER32_INIT_VALUE,
828 lzo_adler32, c_adler32);
829 if (h->flags & F_CRC32_C)
830 lzo_check(CRC32_INIT_VALUE,
836 // if (option_mask32 & OPT_F)
837 // r = lzo1x_decompress(b1, src_len, b2, &d, NULL);
839 r = lzo1x_decompress_safe(b1, src_len, b2, &d, NULL);
841 if (r != 0 /*LZO_E_OK*/ || dst_len != d) {
842 bb_error_msg_and_die("corrupted data");
846 /* "stored" block => no decompression */
850 if (!(option_mask32 & OPT_F)) {
851 /* verify checksum of uncompressed block */
852 if (h->flags & F_ADLER32_D)
853 lzo_check(ADLER32_INIT_VALUE,
855 lzo_adler32, d_adler32);
856 if (h->flags & F_CRC32_D)
857 lzo_check(CRC32_INIT_VALUE,
862 /* write uncompressed block data */
863 xwrite(1, dst, dst_len);
870 /**********************************************************************/
871 // lzop file signature (shamelessly borrowed from PNG)
872 /**********************************************************************/
874 * The first nine bytes of a lzop file always contain the following values:
877 * --- --- --- --- --- --- --- --- ---
878 * (hex) 89 4c 5a 4f 00 0d 0a 1a 0a
879 * (decimal) 137 76 90 79 0 13 10 26 10
880 * (C notation - ASCII) \211 L Z O \0 \r \n \032 \n
883 /* (vda) comparison with lzop v1.02rc1 ("lzop -1 <FILE" cmd):
884 * Only slight differences in header:
885 * -00000000 89 4c 5a 4f 00 0d 0a 1a 0a 10 20 20 20 09 40 02
886 * +00000000 89 4c 5a 4f 00 0d 0a 1a 0a 10 10 20 30 09 40 02
888 * version lib_version
889 * -00000010 01 03 00 00 0d 00 00 81 a4 49 f7 a6 3f 00 00 00
890 * +00000010 01 03 00 00 01 00 00 00 00 00 00 00 00 00 00 00
891 * ^^^^^^^^^^^ ^^^^^^^^^^^ ^^^^^^^^^^^
893 * -00000020 00 00 2d 67 04 17 00 04 00 00 00 03 ed ec 9d 6d
894 * +00000020 00 00 10 5f 00 c1 00 04 00 00 00 03 ed ec 9d 6d
897 * The rest is identical.
899 static const unsigned char lzop_magic[9] = {
900 0x89, 0x4c, 0x5a, 0x4f, 0x00, 0x0d, 0x0a, 0x1a, 0x0a
903 /* This coding is derived from Alexander Lehmann's pngcheck code. */
904 static void check_magic(void)
906 unsigned char magic[sizeof(lzop_magic)];
907 xread(0, magic, sizeof(magic));
908 if (memcmp(magic, lzop_magic, sizeof(lzop_magic)) != 0)
909 bb_error_msg_and_die("bad magic number");
912 /**********************************************************************/
914 /**********************************************************************/
915 static void write_header(const header_t *h)
919 xwrite(1, lzop_magic, sizeof(lzop_magic));
921 init_chksum(&G.chksum_out);
923 f_write16(h->version);
924 f_write16(h->lib_version);
925 f_write16(h->version_needed_to_extract);
931 f_write32(h->gmtdiff);
933 l = (int) strlen(h->name);
938 f_write32(chksum_getresult(&G.chksum_out, h));
941 static int read_header(header_t *h)
947 memset(h, 0, sizeof(*h));
948 h->version_needed_to_extract = 0x0900; /* first lzop version */
951 init_chksum(&G.chksum_in);
953 h->version = f_read16();
954 if (h->version < 0x0900)
956 h->lib_version = f_read16();
957 if (h->version >= 0x0940) {
958 h->version_needed_to_extract = f_read16();
959 if (h->version_needed_to_extract > LZOP_VERSION)
961 if (h->version_needed_to_extract < 0x0900)
964 h->method = f_read8();
965 if (h->version >= 0x0940)
966 h->level = f_read8();
967 h->flags = f_read32();
968 if (h->flags & F_H_FILTER)
969 return 16; /* filter not supported */
970 h->mode = f_read32();
971 h->mtime = f_read32();
972 if (h->version >= 0x0940)
973 h->gmtdiff = f_read32();
980 checksum = chksum_getresult(&G.chksum_in, h);
981 h->header_checksum = f_read32();
982 if (h->header_checksum != checksum)
987 r = lzo_get_method(h);
991 /* check reserved flags */
992 if (h->flags & F_RESERVED)
995 /* skip extra field [not used yet] */
996 if (h->flags & F_H_EXTRA_FIELD) {
999 /* note: the checksum also covers the length */
1000 init_chksum(&G.chksum_in);
1001 h->extra_field_len = f_read32();
1002 for (k = 0; k < h->extra_field_len; k++)
1004 checksum = chksum_getresult(&G.chksum_in, h);
1005 h->extra_field_checksum = f_read32();
1006 if (h->extra_field_checksum != checksum)
1013 static void p_header(header_t *h)
1020 bb_error_msg_and_die("header_error %d", r);
1023 /**********************************************************************/
1025 /**********************************************************************/
1026 static void lzo_set_method(header_t *h)
1030 if (option_mask32 & OPT_1) {
1031 h->method = M_LZO1X_1_15;
1032 } else if (option_mask32 & OPT_789) {
1033 #if ENABLE_LZOP_COMPR_HIGH
1034 h->method = M_LZO1X_999;
1035 if (option_mask32 & OPT_7)
1037 else if (option_mask32 & OPT_8)
1042 bb_error_msg_and_die("high compression not compiled in");
1044 } else { /* levels 2..6 or none (defaults to level 3) */
1045 h->method = M_LZO1X_1;
1046 level = 5; /* levels 2-6 are actually the same */
1052 static int do_lzo_compress(void)
1057 memset(h, 0, sizeof(*h));
1061 h->version = (LZOP_VERSION & 0xffff);
1062 h->version_needed_to_extract = 0x0940;
1063 h->lib_version = lzo_version() & 0xffff;
1065 h->flags = (F_OS & F_OS_MASK) | (F_CS & F_CS_MASK);
1067 if (!(option_mask32 & OPT_F) || h->method == M_LZO1X_999) {
1068 h->flags |= F_ADLER32_D;
1069 if (option_mask32 & OPT_C)
1070 h->flags |= F_ADLER32_C;
1073 return lzo_compress(h);
1077 /**********************************************************************/
1079 /**********************************************************************/
1080 static int do_lzo_decompress(void)
1086 return lzo_decompress(&header);
1089 static char* FAST_FUNC make_new_name_lzop(char *filename, const char *expected_ext UNUSED_PARAM)
1091 if (option_mask32 & OPT_DECOMPRESS) {
1092 char *extension = strrchr(filename, '.');
1093 if (!extension || strcmp(extension + 1, "lzo") != 0)
1094 return xasprintf("%s.out", filename);
1098 return xasprintf("%s.lzo", filename);
1101 static IF_DESKTOP(long long) int FAST_FUNC pack_lzop(transformer_state_t *xstate UNUSED_PARAM)
1103 if (option_mask32 & OPT_DECOMPRESS)
1104 return do_lzo_decompress();
1105 return do_lzo_compress();
1108 int lzop_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1109 int lzop_main(int argc UNUSED_PARAM, char **argv)
1111 getopt32(argv, OPTION_STRING);
1114 if (applet_name[4] == 'c')
1115 option_mask32 |= (OPT_STDOUT | OPT_DECOMPRESS);
1117 if (applet_name[4] == 'o')
1118 option_mask32 |= OPT_DECOMPRESS;
1120 global_crc32_table = crc32_filltable(NULL, 0);
1121 return bbunpack(argv, pack_lzop, make_new_name_lzop, /*unused:*/ NULL);